"As iron sharpens iron, so one man sharpens another." -Prov. 27:17
One of the more important reasons for Christians, especially pastors and ministers, to blog is what I call the "Iron Sharpens Iron" effect. As one posts articles and others stop by to comment, there is an ongoing sharing process that one cannot duplicate easily through other forums. Other Bible teachers and pastors will come aboard and drop a comment or two which actually in my experience helps to clarify and refine my own writing and teaching. The feedback can become a real blessing.